///////////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2015 F4EXB                                                      //
// written by Edouard Griffiths                                                  //
//                                                                               //
// This program is free software; you can redistribute it and/or modify          //
// it under the terms of the GNU General Public License as published by          //
// the Free Software Foundation as version 3 of the License, or                  //
//                                                                               //
// This program is distributed in the hope that it will be useful,               //
// but WITHOUT ANY WARRANTY; without even the implied warranty of                //
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                  //
// GNU General Public License V3 for more details.                               //
//                                                                               //
// You should have received a copy of the GNU General Public License             //
// along with this program. If not, see <http://www.gnu.org/licenses/>.          //
///////////////////////////////////////////////////////////////////////////////////

#include <QDockWidget>
#include <QMainWindow>
#include <QDebug>
#include "dsp/threadedsamplesink.h"
#include "dsp/channelizer.h"
#include "dsp/dspengine.h"
#include "dsp/spectrumvis.h"
#include "gui/glspectrum.h"
#include "plugin/pluginapi.h"
#include "util/simpleserializer.h"
#include "util/db.h"
#include "gui/basicchannelsettingswidget.h"
#include "mainwindow.h"

#include "bfmdemodgui.h"

#include "ui_bfmdemodgui.h"
#include "bfmdemod.h"

const int BFMDemodGUI::m_rfBW[] = {
	80000, 100000, 120000, 140000, 160000, 180000, 200000, 220000, 250000
};

int requiredBW(int rfBW)
{
	if (rfBW <= 48000)
		return 48000;
	else if (rfBW < 100000)
		return 96000;
	else
		return 384000;
}

BFMDemodGUI* BFMDemodGUI::create(PluginAPI* pluginAPI)
{
	BFMDemodGUI* gui = new BFMDemodGUI(pluginAPI);
	return gui;
}

void BFMDemodGUI::destroy()
{
	delete this;
}

void BFMDemodGUI::setName(const QString& name)
{
	setObjectName(name);
}

QString BFMDemodGUI::getName() const
{
	return objectName();
}

qint64 BFMDemodGUI::getCenterFrequency() const
{
	return m_channelMarker.getCenterFrequency();
}

void BFMDemodGUI::setCenterFrequency(qint64 centerFrequency)
{
	m_channelMarker.setCenterFrequency(centerFrequency);
	applySettings();
}

void BFMDemodGUI::resetToDefaults()
{
	blockApplySettings(true);

	ui->rfBW->setValue(4);
	ui->afBW->setValue(3);
	ui->volume->setValue(20);
	ui->squelch->setValue(-40);
	ui->deltaFrequency->setValue(0);

	blockApplySettings(false);
	applySettings();
}

QByteArray BFMDemodGUI::serialize() const
{
	SimpleSerializer s(1);
	s.writeS32(1, m_channelMarker.getCenterFrequency());
	s.writeS32(2, ui->rfBW->value());
	s.writeS32(3, ui->afBW->value());
	s.writeS32(4, ui->volume->value());
	s.writeS32(5, ui->squelch->value());
	s.writeU32(7, m_channelMarker.getColor().rgb());
	s.writeBlob(8, ui->spectrumGUI->serialize());
	return s.final();
}

bool BFMDemodGUI::deserialize(const QByteArray& data)
{
	SimpleDeserializer d(data);

	if (!d.isValid())
	{
		resetToDefaults();
		return false;
	}

	if (d.getVersion() == 1)
	{
		QByteArray bytetmp;
		quint32 u32tmp;
		qint32 tmp;

		blockApplySettings(true);
	    m_channelMarker.blockSignals(true);

		d.readS32(1, &tmp, 0);
		m_channelMarker.setCenterFrequency(tmp);

		d.readS32(2, &tmp, 4);
		ui->rfBW->setValue(tmp);
		ui->rfBWText->setText(QString("%1 kHz").arg(m_rfBW[tmp] / 1000.0));
		m_channelMarker.setBandwidth(m_rfBW[tmp]);

		d.readS32(3, &tmp, 3);
		ui->afBW->setValue(tmp);

		d.readS32(4, &tmp, 20);
		ui->volume->setValue(tmp);

		d.readS32(5, &tmp, -40);
		ui->squelch->setValue(tmp);

		if(d.readU32(7, &u32tmp))
		{
			m_channelMarker.setColor(u32tmp);
		}

		d.readBlob(8, &bytetmp);
		ui->spectrumGUI->deserialize(bytetmp);

		blockApplySettings(false);
	    m_channelMarker.blockSignals(false);

		applySettings();
		return true;
	}
	else
	{
		resetToDefaults();
		return false;
	}
}

bool BFMDemodGUI::handleMessage(const Message& message)
{
	return false;
}

void BFMDemodGUI::viewChanged()
{
	applySettings();
}

void BFMDemodGUI::on_deltaMinus_toggled(bool minus)
{
	int deltaFrequency = m_channelMarker.getCenterFrequency();
	bool minusDelta = (deltaFrequency < 0);

	if (minus ^ minusDelta) // sign change
	{
		m_channelMarker.setCenterFrequency(-deltaFrequency);
	}
}

void BFMDemodGUI::on_deltaFrequency_changed(quint64 value)
{
	if (ui->deltaMinus->isChecked())
	{
		m_channelMarker.setCenterFrequency(-value);
	}
	else
	{
		m_channelMarker.setCenterFrequency(value);
	}
}

void BFMDemodGUI::on_rfBW_valueChanged(int value)
{
	ui->rfBWText->setText(QString("%1 kHz").arg(m_rfBW[value] / 1000.0));
	m_channelMarker.setBandwidth(m_rfBW[value]);
	applySettings();
}

void BFMDemodGUI::on_afBW_valueChanged(int value)
{
	ui->afBWText->setText(QString("%1 kHz").arg(value));
	applySettings();
}

void BFMDemodGUI::on_volume_valueChanged(int value)
{
	ui->volumeText->setText(QString("%1").arg(value / 10.0, 0, 'f', 1));
	applySettings();
}

void BFMDemodGUI::on_squelch_valueChanged(int value)
{
	ui->squelchText->setText(QString("%1 dB").arg(value));
	applySettings();
}

void BFMDemodGUI::on_audioStereo_toggled(bool stereo)
{
	if (!stereo)
	{
		ui->audioStereo->setStyleSheet("QToolButton { background:rgb(79,79,79); }");
	}

	applySettings();
}

void BFMDemodGUI::onWidgetRolled(QWidget* widget, bool rollDown)
{
}

void BFMDemodGUI::onMenuDoubleClicked()
{
	if(!m_basicSettingsShown)
	{
		m_basicSettingsShown = true;
		BasicChannelSettingsWidget* bcsw = new BasicChannelSettingsWidget(&m_channelMarker, this);
		bcsw->show();
	}
}

BFMDemodGUI::BFMDemodGUI(PluginAPI* pluginAPI, QWidget* parent) :
	RollupWidget(parent),
	ui(new Ui::BFMDemodGUI),
	m_pluginAPI(pluginAPI),
	m_channelMarker(this),
	m_basicSettingsShown(false),
	m_channelPowerDbAvg(20,0),
	m_rate(625000)
{
	ui->setupUi(this);
	ui->deltaFrequency->setColorMapper(ColorMapper(ColorMapper::ReverseGold));
	ui->deltaFrequency->setValueRange(7, 0U, 9999999U);

	setAttribute(Qt::WA_DeleteOnClose, true);
	connect(this, SIGNAL(widgetRolled(QWidget*,bool)), this, SLOT(onWidgetRolled(QWidget*,bool)));
	connect(this, SIGNAL(menuDoubleClickEvent()), this, SLOT(onMenuDoubleClicked()));

	m_spectrumVis = new SpectrumVis(ui->glSpectrum);
	m_bfmDemod = new BFMDemod(m_spectrumVis);
	m_channelizer = new Channelizer(m_bfmDemod);
	m_threadedChannelizer = new ThreadedSampleSink(m_channelizer, this);
	connect(m_channelizer, SIGNAL(inputSampleRateChanged()), this, SLOT(channelSampleRateChanged()));
	DSPEngine::instance()->addThreadedSink(m_threadedChannelizer);

	ui->glSpectrum->setCenterFrequency(m_rate / 4);
	ui->glSpectrum->setSampleRate(m_rate / 2);
	ui->glSpectrum->setDisplayWaterfall(false);
	ui->glSpectrum->setDisplayMaxHold(false);
	ui->glSpectrum->setSsbSpectrum(true);
	m_spectrumVis->configure(m_spectrumVis->getInputMessageQueue(), 64, 10, FFTWindow::BlackmanHarris);
	connect(&m_pluginAPI->getMainWindow()->getMasterTimer(), SIGNAL(timeout()), this, SLOT(tick()));

	//m_channelMarker = new ChannelMarker(this);
	m_channelMarker.setColor(Qt::blue);
	m_channelMarker.setBandwidth(12500);
	m_channelMarker.setCenterFrequency(0);
	m_channelMarker.setVisible(true);
	connect(&m_channelMarker, SIGNAL(changed()), this, SLOT(viewChanged()));
	m_pluginAPI->addChannelMarker(&m_channelMarker);

	ui->spectrumGUI->setBuddies(m_spectrumVis->getInputMessageQueue(), m_spectrumVis, ui->glSpectrum);

	applySettings();
}

BFMDemodGUI::~BFMDemodGUI()
{
	m_pluginAPI->removeChannelInstance(this);
	DSPEngine::instance()->removeThreadedSink(m_threadedChannelizer);
	delete m_threadedChannelizer;
	delete m_channelizer;
	delete m_bfmDemod;
	//delete m_channelMarker;
	delete ui;
}

void BFMDemodGUI::blockApplySettings(bool block)
{
    m_doApplySettings = !block;
}

void BFMDemodGUI::applySettings()
{
	if (m_doApplySettings)
	{
		setTitleColor(m_channelMarker.getColor());

		m_channelizer->configure(m_channelizer->getInputMessageQueue(),
			requiredBW(m_rfBW[ui->rfBW->value()]), // TODO: this is where requested sample rate is specified
			m_channelMarker.getCenterFrequency());

		ui->deltaFrequency->setValue(abs(m_channelMarker.getCenterFrequency()));
		ui->deltaMinus->setChecked(m_channelMarker.getCenterFrequency() < 0);

		m_bfmDemod->configure(m_bfmDemod->getInputMessageQueue(),
			m_rfBW[ui->rfBW->value()],
			ui->afBW->value() * 1000.0,
			ui->volume->value() / 10.0,
			ui->squelch->value(),
			ui->audioStereo->isChecked());
	}
}

void BFMDemodGUI::leaveEvent(QEvent*)
{
	blockApplySettings(true);
	m_channelMarker.setHighlighted(false);
	blockApplySettings(false);
}

void BFMDemodGUI::enterEvent(QEvent*)
{
	blockApplySettings(true);
	m_channelMarker.setHighlighted(true);
	blockApplySettings(false);
}

void BFMDemodGUI::tick()
{
	Real powDb = CalcDb::dbPower(m_bfmDemod->getMagSq());
	m_channelPowerDbAvg.feed(powDb);
	ui->channelPower->setText(QString::number(m_channelPowerDbAvg.average(), 'f', 1));

	if (m_bfmDemod->getPilotLock())
	{
		if (ui->audioStereo->isChecked())
		{
			ui->audioStereo->setStyleSheet("QToolButton { background-color : green; }");
		}
	}
	else
	{
		if (ui->audioStereo->isChecked())
		{
			ui->audioStereo->setStyleSheet("QToolButton { background:rgb(79,79,79); }");
		}
	}

	//qDebug() << "Pilot lock: " << m_bfmDemod->getPilotLock() << ":" << m_bfmDemod->getPilotLevel(); TODO: update a GUI item with status
}

void BFMDemodGUI::channelSampleRateChanged()
{
	m_rate = m_bfmDemod->getSampleRate();
	ui->glSpectrum->setCenterFrequency(m_rate / 4);
	ui->glSpectrum->setSampleRate(m_rate / 2);
}